The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 1993
Filed:
Apr. 05, 1991
Applicant:
Inventors:
Linda S Brehmer, St. Petersburg, FL (US);
Keith Souders, Tampa, FL (US);
Assignee:
AT&T Paradyne Corporation, Largo, FL (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 59 ; 375 39 ; 371 43 ; 341 61 ;
Abstract
A data transmitting QAM modem with partitions incoming data into unequal frames. Some of the bits in each frame are encoded using fractional rate encoding and then recombined the rest of the bits to form frames of equal bits. Trellis encoding is then performed on the frames of equal bits. Advantageously the number of points in the QAM constellation is also increased to an integer divisible by a power of 2 to reduce the complexity of fractional rate encoding.